Multistore 404 error problem

[trustport]

Hello all, i'm currently having this issues which is my main website is working but not my other stores.

 

for example, my 1st domain is www.A.com.my and my 2nd domain is www.A.com.sg.

 

but the problem is the second domain not working, it throw 404 error. 

 

Anyone can help me? how to setup multistore?

 

Thanks in advance.